1985976667 has 2 divisors, whose sum is σ = 1985976668. Its totient is φ = 1985976666.

The previous prime is 1985976661. The next prime is 1985976673. The reversal of 1985976667 is 7666795891.

It is a balanced prime because it is at equal distance from previous prime (1985976661) and next prime (1985976673).

It is a cyclic number.

It is not a de Polignac number, because 1985976667 - 2³ = 1985976659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1985976599 and 1985976608.

It is not a weakly prime, because it can be changed into another prime (1985976661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992988333 + 992988334.

It is an arithmetic number, because the mean of its divisors is an integer number (992988334).

Almost surely, 2^1985976667 is an apocalyptic number.

1985976667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985976667 is an equidigital number, since it uses as much as digits as its factorization.

1985976667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 64.

The square root of 1985976667 is about 44564.2981208052. The cubic root of 1985976667 is about 1256.9694250990.

The spelling of 1985976667 in words is "one billion, nine hundred eighty-five million, nine hundred seventy-six thousand, six hundred sixty-seven".